弦支穹顶结构的摩擦摆隔震控制研究  

Seismic Isolation and Control of Suspend-Dome Structures Using Friction Pendulum Bearings

作　　者：庄鹏 赵文选[1] ZHUANG Peng;ZHAO Wenxuan(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044;Multi-Functional Shaking Tables Laboratory,Beijing University of Civil Engineering and Architecture,Beijing 100044;Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials,Beijing University of Civil Engineering and Architecture,Beijing 100044)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学大型多功能振动台阵实验室,北京100044 [3]北京建筑大学工程结构与新材料北京高等学校工程研究中心,北京100044

出　　处：《北京建筑大学学报》2023年第6期50-61,共12页Journal of Beijing University of Civil Engineering and Architecture

基　　金：北京市自然科学基金资助项目(8182016);北京建筑大学大型多功能振动台阵实验室开放研究专项基金项目(2022MFSTL12)。

摘　　要：弦支穹顶结构是一种集成单层球面网壳和预应力索杆系统的新型空间结构,广泛应用于地标性大型公共建筑中。此类建筑大多具有较高的抗震需求,然而,当遭遇强震作用时,仅依靠强度和延性的传统抗震手段难以有效避免结构的强震损伤甚至失效。鉴于此,将摩擦摆支座用于弦支穹顶结构,探究其对整体结构抗震性能的提升作用。阐述摩擦摆支座的构造和隔震耗能原理,通过OpenSees实现其滞回行为的数值模拟。将一批摩擦摆支座用作某弦支穹顶结构的高位隔震系统,采用OpenSees进行模态分析和非线性抗震时程分析,对比无控和受控结构的动力响应。研究结果表明,采用摩擦摆支座系统对弦支穹顶屋盖及其支撑体结构均可取得优良的振动控制效果。Suspend-dome structure is a combination of single-layer spherical lattice shell and its prestressed cable-strut system,which has been widely used in landmark large-scale public buildings.These building usually have relatively high seismic requirements.However,for the suspend-domes,the conventional seismic resistance techniques relying on strength and ductility properties cannot be used to prevent structural damage and failure from strong earthquakes.In view of this,friction pendulum bearings were applied to the suspend-dome structures to explore their seismic response upgrade mechanisms.The configuration and control principle of FPB were described,and its hysteretic responses simulation was implemented using OpenSees.A group of FPBs comprised a high-position isolation system for a suspend-dome structure.Based on the OpenSees platform,modal analysis and nonlinear time-history analysis were carried out,and dynamic responses of uncontrolled and controlled structures were compared and analyzed.The results show that the FPB isolation system is effective in the seismic vibration control of the suspend-dome roof and its substructure.

关 键 词：弦支穹顶 摩擦摆系统 隔震 地震响应 振动控制 

分 类 号：TU394[建筑科学—结构工程] TU352.12